Seyg-El is a fictional character appearing in American comic books published by DC Comics. He is Superman and Supergirl's grandfather and the father of Jor-El and Zor-El. He is the former head of the Kryptonian Council. The character's name is a derivation of Siegel, the surname of Superman co-creator, Jerry Siegel.
Fictional character biography
In the Silver Age Seyg-El was known as Jor-El I, he created an experimental rocket-ship capable of traveling through hyperspace. He used this to travel to Earth and passed this information on to his son Jor-El II.
Seyg-El was one if the Leading members of the Science Council and patriarch to the House of El. He fathered two children Jor-El and Zor-El with his genetically selected mate. He had a tough time relating to his brilliant but rebellious son Jor-El who fought against Kryptonian rules and tradition.  Seyg-El encountered the time-traveling heroes Starman (Jack Knight), Mikaal Tomas on their intergalactic journey. His young son Jor-El brought them to their home where Seyg-El was interrogated them. He believed they were members of Black Zero. When they tried to convince they are weren't he did not believe they were from another planet as they looked to much like a Kryptonian. But with the help of Jor-El they were able to escape Seyg-El's sentries.
When radiation caused by Kryptonite from the planet core claimed thousands of his Kryptonians lives known as the Green Plague, of its victims was Zon-Em. His mate was Lara was then reassigned a new mate by the master of the gestation chamber selecting Seyg-El's son Jor-El. When he informed his son he shockingly asked to meet his mate which was unheard of in their culture. However he was granted the request, and Jor-El soon married Lara.
Powers and abilities
As a Kryptonian under a yellow star; Same powers and abilities as Superman.
In the Elseworlds series Superman: Last Son of Earth, Seyg-El comes to find his son who has adopted a young Alien from named Clark Kent. Seyg-El reluctantly allows his son to adopt the child and he is named Kal-El.
In other media
Seg-El is the main character in the TV series Krypton, portrayed by Cameron Cuffe as Superman's grandfather and Jor-El's father. As a child, he and his family were once stripped of their family name by the Council of Krypton when his grandfather, Val-El, was sentenced to death for constructing the Fortress of Solitude from outside threats in the universe. Seg-El along with his parents, Ter-El and Charys-El, were forced to live in the slums of Kandor. Now in his 20's he stops a Black Zero terrorist attack and is rewarded the chance to join the Science Council and even betrothed to Nyssa-Vex. He secretly has a relationship with Lyta-Zod, the daughter of Krypton's chief military guard Alura-Zod. Seg-El met Adam Strange a time traveller from Earth who travelled to th past to warn him about Brainiac who plans to destroy Krypton before Superman was born.
- Seyg-El's name is a derivation of Siegel, the surname of Superman co-creator, Jerry Siegel.
- In the Pre-Crisis continuity, Jor-El's father was named Jor-El the First.